Greet the first login with a keybindings toast again

Opening the cheatsheet outright put a menu in front of someone who had not
asked for one, and it blocked first run until they dismissed it. Go back to a
toast that opens the same menu when clicked.

The body carries real newlines now. It was written with a literal \n, which the
card renders as the two characters rather than a line break.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

bin/omarchy-provision-first-run

@@ -83,12 +83,12 @@ run_first_run_step "apply speaker tuning" \
   bash "$OMARCHY_PATH/install/user/first-run/audio-tuning.sh"
 
 omarchy-notification-wait || log_first_run "Timed out waiting for notification service; continuing"
+# Each send returns only once the server has taken the toast, so sending in
+# order is enough to stack them newest-on-top.
+run_first_run_step "show welcome notification" \
+  bash "$OMARCHY_PATH/install/user/first-run/welcome.sh"
 run_first_run_step "schedule Wi-Fi/update notifications" \
   bash "$OMARCHY_PATH/install/user/first-run/wifi.sh"
-# Waits for the menu to be answered, so it goes last and leaves the toasts
-# waiting underneath.
-run_first_run_step "show keybindings" \
-  bash "$OMARCHY_PATH/install/user/first-run/keybindings.sh"
 
 if (( first_run_failed == 0 )); then
   omarchy-done mark "$FIRST_RUN_DONE"